Pirn winder or the like



b 3, 1953 H. 1.. MUSCHAMP ET AL 2,651,472

PIRN WINDER OR THE LIKE Filed Aug. 15, 1952 2 Sheets-Sheet l P 1953 H. L. MUSCHAMP ETAL 7 2,651,472

PIRN WINDER OR THE LIKE Filed Aug. 13, 1952 2 Sheets-Sheet 2 Patented Sept. 8, i953 UNITED STATES PATENT OFFICE Harold Lionel Muschamp, Bralnhall, and John Robert Grady, Cheadle Hulme, England; said Grady assignor to said Muschamp Application August 13, 1952, Serial'No.304,084 In Great Britain August 15,1951

This invention relates to winders for pirns and preceding advance, reaches a predetermined diameter as determined by a controlling feeler.

There are many known constructional forms of feeler-controlled feed traverse mechanism of the kind aforesaid, the feeler being usually inthe form of a rotatable disc, adjustable for setting at a predetermined distance from the winding axis, and advancing with the carriage so as always to be presented to that portion of the package being wound at the base end of the traverse.

In such mechanisms, contact of the feeler with the yarn on the package is essential for activating the feed mechanism and with the modern trend for the use of yarns such as rayon yarns of very fine filaments or fibres every effort is made to increase the sensitivity of the feeler and to reduce to a maximum the frictional contact of the feeler with the yarn, such contact even when quite light being known to cause damage to the yarn by polishing the same with resultant visible marking or barring in any fabric woven therefrom. Another-problem which has become more acute owing to the relatively slippery nature and fineness of the aforesaid synthetic yarns of the present day, is the incidence of soft nose efiect when using a feelercontrolled traverse for the winding mechanism.

In some known mechanisms, contact of the feeler with the package is used to effect physical movement of some part of the feed mechanism, for example to turn a light worm or, in the case of a pawl-actuated mechanism for rotating the feed screw, to advance a lever or finger into the path of some moving part until engagement therewith results in actuation of the feed advance mechanism. Any such mechanism entails the extraction of a working effort from contact between the feeler and the package the amount of Work being the product of the force and the distance through which it has to move, even if only to move it into the path of an actuating member.

The object of the present invention is to reduce any factor of work to a minimum by increased sensitivity of the feeler mechanism, and thereby substantially to eliminate the problems aforesaid.

. 4 Claims. (01. wig-'34} According to the invention feed traverse mechanism for a pirn winder comprises a traverse feed screw, driving means for said feed screw including a resiliently loaded friction brake drive controlling device and a feeler located between said pirn and said controlling device whereby contact of the feeler with the pirn relieves part of the load on the friction brake to permit momentary driving of the feed screw.

In the accompanying drawings:

Fig. 1 is an end elevation;

Fig. 2 is a plan of one example of a feeler controlled traverse feed mechanism made in accordance with the present invention, and

Fig; 3 is a diagram showing a modification.

As shown in the drawings a and bare the headstock and tailstock respectively of a pirn winder the latter mounted on a rod c, a partly wound pirn (1 being shown in position. Parallel with the rod 0 is a further rod e and a carriage j for the'reciprocating yarn guide (not shown) is slidably mounted on these two rods. Pivotally mounted on said carriage is lever f carrying a nutelement f urged outwardly from the carriage by a spring f On the opposite side of the rod 6 from the rod c is a feed screw 9 of the usual construction and engageable by the said nut element onthe front end of which feed screw is mounted a ratchet wheel h. At the front end of the winding machine is a crank i shown diagrammatically in isolation from the winding station, which is connected by a link to a ratchet arm 7c pivotally mounted on the end of the feed screw, said arm carrying a pawl or ratchet m complimentary to the ratchet wheel 71.. Also rotatably mounted on the feed screw is a mask n for the ratchet wheel which has a secondary mask-like portion n located on the inner side of the front frame of the winder.

Pivotally mounted on a rod 0, parallel to the feed screw is a U-shaped former p having at its rear end an adjustable base-turns former p the former being urged by a light spring or towards the winding centres. Slidably mounted in a bracket f on the carriage f is a two-part feeler r slightly inclined from the right angles to the winding axis as shown in Fig. 2, carrying a freely rotatable feeler wheel r at the end and having a feeler nose r at the other end normally in sliding engagement with the edge of the former p or 12 The former carries a pad p which engages frictionally with the mask-like portion 11, aforesaid. The mask n has a projecting tongue n adapted to be engaged by the arm is.

In operation, the crank is rotated continuously during the winding operation and imparts a reciprocating motion to the pawl arm is. Unless the mask is in the position shown in the drawings the arm R: will raise it to such position by engaging the tongue 11. and the friction pad 12 engaging the mask-like portion n under the effort of the light spring q will just hold the mask in such position against the :action of gravity and any light return drag of the pawl m. The nose r of the feeler rides against the edge of the former p or p and the least pressure on the disc 1' from the bobbin 11 causes the force oi the light spring q to be divided part being taken now by the nose 1 as well :as by the paid in consequence the mask n slips round under the force of gravity and on the next upward movement of the pawl arm k the pawl will overhang the upper end of the mask so as to engage the ratchet wheel and turn the feed screws The mask is simultaneously raised to its normal position and remains there until released, the pawl at the upper end of eachstroke merely dropping over the end of the mask .to engage the ratchet wheel but without moving the same.

The mechanism above described :may be the sole means for turning the feed screw or may be supplemental to a main ratchet feed set to provide a continuous traverse feed just short of that actually required for the bobbin being wound.

In the modification shown in Fig. 3 in addition .to the feeler controlled mechanism for :advancing the feed screw as shown in ,Figs. .1 and 2 but represented diagrammatically by the crank 2, link pawl m carried by the arm 1c and the mask n there is .a link i connected to the crank i, pawl m carried by the arm k and mask 11 the latter being adjustably secured in any desired position by a screw n located in an armate slot n The mask n can thus beset so that the pawl m advances the feed screw a positive number of teeth with each rotation of the crank i intermittently with any permitted advance of the feed screw by the pawl m. Such positive and continuous advance may be set, as previously stated, so as to be just less than or short .of that required for the build up of the bobbin according to the gauge of the yarn. Also the pawl m may have a tension spring s which enables the pawl to be turned onto :its back into an inoperative position leaving the advance of the feed screw to be effected solely by the pawl m while the pawl m may similarly be adapted for movement into an inoperative position leaving the feeler controlled pawl alone to effect the advance of the feed screw. When both advancing means :are used as above described the contact of the feeler wheel with the bobbin will, therefore, be less frequent as the ieeler-constrolled feed will only be required to make up the said Shortage of the main traverse movement.

What we claim is:

.1. .Feed traverse mechanism for a pirn winder comprising a traverse feed screw, driving means :Eor said teed screw including a resiliently loaded friction brake drive controlling device and a ieeler located between said pirn and said controlling device whereby contact of the feeler with the pirn relieves part of the load on the friction brake to permit momentary driving of the teed screw.

.2. Feed traverse mechanism for :a pirn winder according to claim 1 characterised in that the driving means {or the feed screw comprises a reciprocating ratchet and ratchet wheel, a mask for said ratchet wheel, means .for moving said mask to uncover said ratchet wheel when released lay the brake :device and means associated with the reciprocating ratchet for returning the mask into an operative position simultaneously with the rotation of the ratchet wheel so that such ,mask may be retained in such position by the friction brake device if permitted by the teeler.

.3. Feed traverse mechanism according "to claim 1 characterised by further and adjustable driving means .for the ieedscrew for continuous advance thereof so arranged that the feeler controlled advance is supplemental thereto.

4. Feed traverse "mechanism according to claim 2 characterised by a second reciprocating ratchet engageable with the ratchet wheel and an adjustable mask therefor so arranged that it can operate alternately with the feeler controlled ratchet whereby ;a continuous predetermined advance can be given to the feed screw and the feeler controlled advance will be supplemental thereto.

HAROLD LIONEL .MIISCHAMP. JOHN .RQBERT GRADY. 

